The truce sees 1,000 new jobs guaranteed, considers the use of temporary and fixed-term workers, and involves the union in HMRC's trial use of private companies to run contact centres.

PCS Revenue and Customs group secretary Peter Lockhart said in a statement: "Our members' campaigning efforts have already made a real difference but these measures do not change the fact that staffing levels are still being significantly reduced. We must continue to build our political campaigning efforts to achieve permanent guarantees over job cuts."